Welcome back for day 2 of the Marlo Sewalong.
Pin the Front sweater to the Back Sweater at the shoulder edges with right sides touching. Serge or sew the shoulder seam with a stretch stitch in a 3/8" seam allowance. Press the seam allowances open or to the back.
OPTIONAL: If your fabric is very stretchy, you may want to add a strip of clear elastic to stabilize the shoulder seam as I did above. This will keep it from stretching out over time.
To sew the clear elastic, arrange elastic on top of seam allowance, centering over 3/8" seam line. Serge or sew the seam, with the elastic on top, catching it in the line of stitching. Do not stretch the elastic as you sew.
Trim ends of elastic even with armhole and neckline edges as needed.
With right sides touching, pin the sleeve to the armhole of the sweater, matching front and back notches. Match the middle notch to the shoulder seam.
Serge or sew the shoulder seam with a stretch stitch in a 3/8" seam allowance. Press seam allowances toward the sleeve. Repeat for the other sleeve.
With right sides touching, pin the front to the back at sides, continuing to pin sleeve underarm edges together. Make sure the lower edges of the sweater and sleeve align, and that the underarm seams match up.
Serge or sew the side and underarm seam in one continuous line of stitching, using a stretch stitch in a 3/8" seam allowance. You will want to pull the sleeve up to create a straight or slightly curved line of stitching around the armpit. Press seam allowances open or towards the back.
If you havn't done so already, fold the waistband in half lengthwise, wrong sides touching, and press.
With right sides touching, pin the folded Waistband to the lower edge of the sweater. Stretch the Waistband to fit, matching up the double notches at center back, and the single notches to the side seams. The front raw edges should be aligned.
Sew. Press waistband down and seam allowances up towards the sweater.
It should look like this once it's all finished.
That's it for today! It's starting to look like a real sweater. See you back here tomorrow where we will attach the neckband.